Cooling means for rotating mandrel bars



Aug. 27, 19 40.

FIE-1.

G. H. JONES Filed NOV. 23, 1938 COOLING MEANS FOR ROTATING MANDREL BARS 2 Sheets-Sheet l liweiziorx JONES,

' G. H. JONES COOLING MEANS FOR ROTATING MANDREL BARS Aug; 27, 1940.

Filed Nov. 23, 1938 2 Sheets-Sheet 2 656 9 JONEE,

Patented Aug. 27, 1940 UNITED. STATES PATENT OFFICE 2,212,688 COOLING MEANS rgmn o'mrmo MANDR-EL George H. Jones, Lorain, Ohio, assignor to National Tube Company, a corporation of New Jersey Application November 2a, 1938, Serial No. 242,125

Claims. (01. 80- 13) This invention relates to rotating mandrel bars and to a cooling means therefor; and, particularly, to an improved means for assembling the cooling means therein.

5 Various means and devices have been suggested I and used for introducing a cooling fluid-into rotating mandrelbars and the like for the purpose of maintaining the same at a relatively cool temperature during the use thereof. Such means or devices usually employed a fluid conveying pipe for introducing water as the cooling agent intothe mandrel bars. It is necessary that these pipes be replaced from time to time, due to'the wear and corrosion thereof, so it is important that they be assembled, therein in a most convenient man ner to thus expedite the replacement thereof. A number of different ways have been used for assembling'such cooling pipes therein but most of them have been impractical and expensive and too much time was required for their replace-v cooling pipa in connection with rotating mandrel bars and the like in which'the pipes can be easily and quickly replaced in a relatively short time and one in which the wear thereon is reduced to a thereby eliminating the necessity of frequent replacements thereof.

It is one of the objects of .this invention to provide an improved means for assembling cooling pipes in connection with rotating mandrel bars and the like which will insure the positioning of the pipes centrally of the mandrel bars at all times.

It is another object of the invention to provide an improved means for assemblingcooling pipes in connection with mandrel bars and the like which is rugged and, a'tqthe same time, simple and inexpensivein its construction. Various other objects and advantages of thi invention will be more apparent in the course of the following specification and will 'beparticularly pointed out in the appended claims. In the accompanying drawings there is shown, 50 for the purpose of illustration, one embodiment which my invention may assume in' practice.

In these drawings:

Figure 1 is a longitudinal section through a mandrel bar assembly with which my improved 5 invention is incorporated;

" Figure 2, is a similar enlarged section showing more fully the details ofmy invention; and, Figure 3 is a sectiontaken on the line III-m of Figure 2.

Referring more particularly to the drawings there is shown a cylindrical housing 2 disposed in preferably a cylindrical movable carriage or thrust block 3.' The carriage 3 is preferably held in position around the housing 2 by means of bolts l. There is arranged, preferably adjacent theinner end of the housing 2 around the periphery thereof, a threaded portion 5 which is adapted to cooperate with a corresponding threaded por tion arranged on the inner wall of the carriage 3 at one end thereof to securely position the same therein and to provide a means for adjusting the same relativethereto. There is also provided a pivotal locking member or dog 6 suitably ar-' ranged adjacent the inner .end of the housing 2 which is adapted to cooperate with notches arranged in the periphery of an annular ring 6 mounted on the outer end of the housing so as to lock the same against accidental movement and to be disengaged therefrom only when it is desired to adjust the housing 2 relative to the carriage 3. There is positioned, preferably on thebottom of thecarriage 3, a pair of downwardly extending lug portions, one at each end thereof,

in each of which there is arranged an eye bolt I for the purpose of receiving the ends of actuating cables '8' or any other suitable actuating means. These cables may be actuated by any suitable .means, not shown, for moving the rotating mandrel deviceto operable position and retracting the same'therefrom.

There is disposed axially through the ,cylindri-' cal housing 2, a rotatable hollow spindle 9 which is mounted in suitable bearings l0 and thrust bearing l2 positioned in the housing. There is arranged on the forward end of the spindle 9, beyond the housing 2, a mandrel bar l3 having an axially arranged opening M disposed therethrough. There is suitably attached to the outer end of the mandrel bar l3 a mandrel point or plug l5, and there is securely mounted on the inner end thereof preferably an annular member l6 which is disposed'in an opening l! in the end of the spindle 9 and held therein by means of suitable clamping plates l8 and the machine screws l9 so as to securely hold the mandrel bar annular flanged member 20- arranged around the spindle 9 and attached to the end of the housing I 2 by meansv of bolts 2!.

According to the present invention, there is arranged on the inner end of the rotatable spindle 9 a pipe supporting member 22 having an outwardly extending cylindrical portion 23 with a hardened metallic wear-resisting ring-24 preferably inlaid therein around the outer surface, adjacent the end thereof. There is arranged on the inner end of the supporting member 22,

a flange portion 25, and there is provided an axially arranged opening 26 therethrough. The

supporting member 22 is preferably attached to the end of a spindle nut 2! arranged on the inner end of the spindle 9 by means of the flange portion and machine screws 28. There preferably is concentrically arranged through the flange portion, 25, a plurality of openings 29 for a purpose to be described later in thespeciflcation. The

inner end of the housing 2 is closed by means of an annular flanged member 30 similar to the member 20 and attached to the end of the housing by means. of bolts 3|.

There is disposed within the axial opening 25 through the supporting member 22, a longitudinally extending cooling fluid conveying'plpe 32 which extends through the spindle 9 and into -the mandrel bar l3, preferably terminating a short distance from the outer end thereof. This cooling pipe 32 is securely attached to the supporting member 22, preferably by means of welding at 33, at each end thereof, but it will be understood that it may be attached thereto in any other suitable manner. Also, the outside diameter of the conveying pipe 32 issmaller than the diameter of the cylindrical axial openings in both the spindie 9 and the mandrel bar l3 so as to provide a space therebetween. I The outer end of the cylindrical portion 23 of the supporting member 22 is rotatably disposed in an opening 34 arranged in a stufline' box 35 suitably positioned adjacent the outer end of the supporting member. There is provided in the stufling box and adapted to be arranged around the outer surface of the hardened metallic wearresisting ring 24 carried by the cylindrical portion 23, packing rings 36 for sealing the end of the supporting member 22 against'leakage.

The stuffing box 35 has an opening 31 arranged therein-communicating with the opening 34 and adapted to receive a suitable flexible inlet hose 38. The inlet hose 38 is preferably supported by lmeans of a clamp or bracket 39 arranged on the inner end of the housing 2. 4 7.

It will be understood that, when in operation, the mandrel bar l3, the spindle. 9, together with the supporting member 22, and the fluid conveypipe 32 carried thereby revolve and the water or other cooling fluid is continually introducedintothe openings 34. and 31 in the ,stuflln box 35 by means of the inlet hose 38 and passes into and through conveying pipe 32 into the interior of the mandrel bar=l3to cool thesame. The water or cooling. fluid then flows back on the outside of the conveying pipe 32 in the space therebetween through the spindle 9 and out through the openings 29 inthe flange portion of the supe porting member 22 to a suitabledrain or other receiving means arranged at that 1 end of the mandrel bar-assembly.

As aresult of my invention, it will be seenthat the supporting member 22, together with the conveying pipe 32 carried thereby, can be easily and conveniently removed and replaced should it be necessary, and that theconveying pipe 32 is not subjected to any undue wear other than corro- While I have shown and described one embodiment of my invention, it will be understood that this embodiment is merely for the purpose of illustration and description and that various other forms may be devised within the scope of my ill-v ,3 vention, as defined in the appended claims;

I claim:

l. A device of the class described including, in combination, a rotatable spindle having an axially arranged opening therethrough, a fluid 10 cooled mandrel bar disposed on one end of said spindle and having an opening arranged therein for receiving a; cooling fluid, supporting means having an axial opening arranged therethrough disposed on the opposite end of said 15 spindle, a cooling fluid conveying means arranged in the axial-opening of said supporting means and securely attached thereto, said conveying means extendinghfrom said supporting means through. the axial opening in said spindle and so into the axial opening in said mandrel bar, stationary means arranged adjacent the outer, free end of'said supporting means, said stationarymeans having an opening arranged therein into which the outer free end of said supporting means 25 is adapted to be'disposed, means carried by said stationary means which is adapted to fit tightly around the outer surface of said supporting 4 means to securely seal the end thereof against leakage during rotation thereof, and means for supplying a cooling fluid to the opening in said stationary means so that it will pm into and through said means into said mandrel bar.

2. A device of the class described including, in combination, a rotatable spindle having-an axially arranged opening therethrough, a fluid c'ooled mandrel bar disposed on one end of said spindle and having an opening axially arranged therein for receiving a cooling fluid, a supporting member having an axial opening arranged therethrough disposed on the opposite end of said spindle, a cooling fluid conveying pipe. arranged in theaxial opening of said supporting memberand securely attached thereto, said conveying pipe extending from said supporting member 45 through the axial opening .in said spindle and into the axial opening in said mandrel bar, a stationary stufling box arranged adjacent the outer free end of said supporting member, saidstufling box having an opening arranged therein into which the outerfree end of said supporting member is adapted to be disposed, means carried by said stufling box which is adapted to flt tigh y around the outer surface of said supporting member to securely seal the end thereof against leakage during rotation thereof, and means for supplying I a-cooling fluid to the opening in said stuiijing box so that it will pass into and throughi'said pipe associated with .said supporting member for conveying a fluid through the opening therein into said mandrel bar, stationary means arranged adjacent the outer free end of said supporting memher having an opening arranged therein into stationary means which flts tightly around said" supporting member to securely seal the end thereof against leakage, and means for supplying a fluid into and through the opening in said stationary means whereby the same will pass through the supporting member and the fluid conveying means associated therewith into the mandrel bar and out through the plurality of holes arranged in the flanged portion of the supporting memher.

5. Means for supplying a fluid to the interior of a rotatable hollow mandrel bar including, in combination, a flange-like supporting member attached to the end of the mandrel bar, said sup porting member having an opening arranged axially therethrough with a plurality of holes concentrically arranged therearound in the flanged portion thereof, a fluid conveying pipe securely arranged in the axial opening of said supporting member and extending therethrough into said mandrel bar, a stationary stufling box disposed around the outer end of said supporting member and having an opening therein communieating with the end of the opening in said sup porting member, means carried by said stufing box which fits tightly around said supporting member to seal the end thereof against leakage, and means for supplying a fluid into and through the opening insaid stufling box whereby the same will pass through the supporting member and pipe carried thereby into the mandrel bar and out through the plurality of openings arranged in the flanged portion of .the supporting member.

GEORGE H. JONES. 

